Johannes th



(ModeL) J. T. PEDERSEN'.

BIT STOCK.

w, 4 PaQtente-d May 5, 1885 UNITED STATES "PATENT Fries.

JQHANNES TH. PEDERSEN, OF BROOKLYN, YORK.

BIT-STOCK. I

$PECIPICATIONTorming part of Letters Patent No. 317,187, dated May 5,1885. Application filed March 5,1885. (ModeL) tween the tool-holder andthe handle of the brace, so that when the brace is revolved and v thehandle is firmly held a multiplied motion is given to the tool-holder torevolve the same with greater rapidity; but the gearing was exposed andliable to become injured or obstructed or to catch in the clothing ofthe workman.

My improvement is made for simplifying the construction, for inclosingall the moving parts, and for allowing the bit-stock'to be reciprocatedand used as a ratchet-drill work ing in either direction. I connect thehandle by gears to a tubular shaft surrounding one crank-arm of thebrace, and at the other end of the tubular shaft is the gear-wheel tothe gear of the tool-holder; or I divide the tubular shaft into twoparts,-so as to apply a coupling or a coupling and double ratchetdevices for rotating the tool when the brace is swinging back and forththe same as a ratchet-drill.

In the drawings, Figure 1 is an elevation partially in section toillustrate the general features of my invention. Fig. "2 is asection, inlarger size, of the handle and connectinggearing between the same andthe tool-holder. Fig. 3 is a cross-section at the line a m. Fig. 4 is anelevation of the tubular arbor, and Fig. 5 is an elevation showing thecoupling for the ends of the tubular shaft and the tubular projectionsof the head.

The bit-stock is composed of an ordinary tool-holder or chuck, L, a heador presser, M, the crank-arm N, the handle D, and the arm A. These partsare of any ordinary construction, except that the crank-arm N and arm Aare not made as usual; but they are preferably united together at A bythe end of the crank N being screwed intothe arm A, and there being ashield, D, at the intersection.

The handle D is provided with a bevel-gear, d, at the lower end, whichpasses into a recess in the shield D, and this handle is either plain orprovided with aprojection or with a leverarm, D pivoted at d, andclosing into a recess in the handle D, when not required, and adapted tobe swung out to form a holdfast to prevent the handle revolving in thehand of the workman as he grasps such handleand rotates the brace.

The tool-holder L is provided with a shaft,

F, passing through the head F and terminating with a gear, F, within arecess at the upper end, and there is a cap, f, that is screwed to thehead F and against the inner face of which the end of the shaft F bearsas the tool is pressed to its place in boring.

At one side of the head F is a tubular projection, f into whichthe endof the arm A is received and securely fastened, preferably by a pin, 2',passed through the parts, with its ends-projecting slightly. Around thistubular projection f is a tubular arbor, 0, with a bevel gear-wheel, 0,at the inner end gearing into the teeth of the wheel F. The tubulararbor 0 preferably extends over and beyond the ends of the pin 73, therebeing holes through the tubular arbor for the insertion or removal ofthe said pin t,- but the inside of the tubular arbor is recessed for theends of such pin '5, so that the pin will keep the tubular arbor inplace endwise, but the arbor is free to be rotated. The tubular shaft Esurrounds the straight rigid arm A, and at one end there is abevel-gear, e, gearing into the bevel-gear d of the handle D. It willnow be understood that if the tubular shaft E and tubular arbor o areconnected or formed as one,the tool-holder will be revolved in the samedirection as the the tubular arbor 0, and there are annulargrooves 2 and3 around inside this arbor 0 near the end, and a springlatch, r, orsimilar connection upon the shaft E, with the end catching into one ofthese grooves. Where being made with notches and projections passaratchet-drill by reciprocating or swinging the parts are in the normalposition for use, I the end of the latch r is in the groove 3. If thislatch is depressed, the tubular shaft E may be slipped endwise todisconnect the gear 6 from the gear d, and then the end of the latch a"will be received into the groove 2. In giving this endwise movement theend of the shaft E is locked by the end of such shaft ing intocorresponding notches in the end of the tubular bearing 1, therebyholding the arbor 0, gear F, shaft F, and tool-holder so that theyrotate with the other part of the brace. I apply at the same place theratchetconnection that allows the brace to be used as the same, andthereby revolving the tool in either direction.

Around the outside of the shaftE there are recesses cut longitudinallyand forming between them parallel ribs B, and the tubular arbor o ismortised for the reception of the pawls P P,-which stand in oppositedirections, and each pawl has a segmental tapering tail over theinclined bottom of the recess that receives said tails, and around thepawls is a hollow ring, R, that has within it the two springs 5 6 andthe two blocks 7 8.

In the position shown in Fig. 3 the spring 6 causes the pawl P to springinwardly and catch against one of the ribs 13 upon the shaft E, and thebeveled end of such pawl is pressed back by each successive projectionwhen the shaft E is being revolved in the direction of the arrow; hencethe shaft E will turn the tubular arbor 0 when the former is beingrevolved in the opposite direction to the arrow, Fig. 3. During thistime the pawl P has been out of action, the spring 5, pressing upon thetail thereof, has thrown the head up out of the way of the ribs B. Theblock 7 prevents the pawl P becoming misplaced. \Vhen the ring R isturned partly around, the spring 6 is brought to press upon the tail ofthe pawl P, lifting the head out of action, and at the same time thespring 5 presses upon the head of P, throwing the same into action, andas this works in the reverse direction to the pawl P the arbor 0 will berotated in the opposite direction to the arrow, Fig. 3, when thebit-stock is swung back and forth.

All the parts of this bit-stock are easily made and kept in order, andthere is but little risk of chips and foreign substances obstructing anyof the parts, because they are inclosed.

I remark that it is not necessary to make the arm A separate from thecrank N, as the handle D and gear d may be made in two parts and screwedtogether after being put in place, and the cap can either be slipped onor made in two halves. The tubular shaft E can be slipped upon the arm Awhen the end of the latter is out of the tubular projectionf I claim asmy invention 1. The combination, in a bit-stock, of the presser M,crank-arm N, straight arm A, the handle D, stock F tubular shaft Ebetween the handle and the stock, shaft F of the toolholder, the gear (2on the handle D, the wheels 6 and 0 on the shaft E, and the gear-wheelF, within and protected by the stock F substan tially as set forth.

2. The combination, in a bit-stock, of the crank N and arm A, the cap D,recessed at its ends for the gears d and e, and surrounding theintersection of the crank and shaft, the handle D around the crank N,gear (1 at the end of the handle D, and the tubular shaft E and gear 0around the arm A, substantially as set forth.

3. The combination, in a bit-stock, of the head F having a tubularprojection, f, at one side, the bit-holder L, and shaft F, the gear F atthe end of the shaft F, and the screw-cap f at the end of the head F,substantially as set forth.

I 4. The combination, in a bit-stock, of the head F having a tubularprojection, f, at one side, the arm A, fastened in' the projectionf thetubular arbor 0 around the projection within the head F", the shaft F,and bevel-gears F and 0 upon the shaft F and arbor 0, respectively,substantially as set forth.

5. The combination, in a bit-stock, of the tool-holder, the shaft F ofthe same, the arm A, and crank N, the arbor 0, and the shaft E aroundthe arm A, the handle D around the crank N, and the bevel-gears F 0 onthe shaft F and arbor 0, respectively, and a coupling to connect theshaft E with arbor 0, and the gear (1 e to connect the handle D andshaft E, substantially as set forth.

6. The combination, in a bit-stock, of the head F projectionf at theside thereof, the arm A, extending from the projection f, the tubularshaft E around the arm A, the tubular arbor 0, bevel-gears F and 0,connecting F and 0, the pawls P P, and ring R around the tubular arbor 0and shaft E, substantially as set forth.

7. The head F having a tubular projection, f, at one side, the arm A,extending out therefrom, and cross-pin connecting the same, the tubulararbor 0 around the projection, and its bevel-gear 0, held in place bysaid cross-pin, the gear F and shaft F and tool-holder connected withthe shaft F, the tubular shaft E around the arm A, the handle D, crankN, bevel-gears d 0 upon the handle D and shaft E, respectively, and acoupling to connect shaft E and arbor 0, substantially as set forth.

Signed by me this 24th day of February, A. D. 1885.

JOHANNES TH. PEDERSEN.

Vitnesses:

Gno. T. PINOKNEY, WILLIAM G. Morr.

